Sample Essay on October 27th 2015 Astronomy picture of the day

October 27th 2015 Astronomy picture of the day


Everyday a unique image of the universe is featured by the professional astronomers. Astronomers included a brief description of the image after discovery of the cosmos. This study describes one of the images drawn on 27 October 2015 by astronaut Simon Addis. The image depicts a heart nebula, which was discovered in its galaxy around 1809. The study reviews the nebula and highlights its uniqueness.


I was drawn to this image by its shape and color. Heart nebula resembles a human heart with some defined lines depicting the outline. The Astronaut came up with this image on 27th October, 2015, using a telescope on the constellation of Cassiiopeia. Simon noted that this large emission nebula named as IC 1805 looks like the heart of a human being. There is a bright glow emitted by the most available element, hydrogen; both the glow and the silhouette are creations of a collection of stars near the center of nebula. At the centre are immature stars from Melotte 15 open cluster, which erodes away various charming dust pillars with the vigorous winds and light. The cluster likewise surrounds some bright stars almost 50 clips the sun’s dimension. Other dim stars represent a portion of the size of the mass and absent microquasar, which was expelled a million years ago. Simon goes on to note that this heart nebula is positioned around 7,500 light years away near. Fishhead Nebula lies at the right side of the image.

There is diverse information related to this image, the Heart Nebula, IC 1805, which lies about 7500 light-years away from the earth (The Planetary Society 2). The image majorly lies at the Perseus Arm in the Galaxy of the Cassiopeia constellation. A glowing gas; hydrogen and the dust lanes outline the image according to the discoveries. Plasma formed through ionization of hydrogen gas and free electrons are the major elements of the object under analysis. The brightest portion of the nebula is uniquely defined as NGC 896 as it was discovered first before the nebula. The intensely red boundary and the configuration are brought by radiation emanating from small groups of stars at the centre of the nebula. Melotte 15 is a group of open stars with some bright stars, almost 50 spans the size of the sun (The Planetary Society 17). In addition to this, some dim stars can be seen occupying a quarter size of the sun. Heart and soul nebulas are both brilliant in this galaxy. To have a good view of them, it is advisable to use a telescope as many stars surround them within the galaxy. A telescope depicts the objects while still in their galaxy. The heart nebula is sometimes referred to as the running dog nebula as it resembles a running dog when observed through the telescope. Nebula IC 1795 is besides bright and mostly found attached on the right side of IC 1805. NGC 896 is the most brilliant part while the dimmest part IC 1871.

The image is thus classified as a constellation with plasma, and hydrogen in the Galaxy of the Cassiopeia. Several scientific discoveries have been made in relation to the IC 1805 nebula heart. It was discovered along the constellation through close up examination via a telescope. From the scientific discoveries the distance between the heart and the soul nebula have been determined due to the centrality of the stars. Therefore, they are located approximately galaxy 6000 and 6500 light years away. Other stars have been discovered at the Perseus Arm. These are the h Persei (NGC 869) and the Chi Persei (NGC 884) at the right and the left sides correspondingly. This pair is mostly referred to as the sword handle clusters due to their location in the constellation. Discoveries that are more scientific include Maffei 1 and Maffei 2, which in visible light are hidden from the dust of the nebula. Paolo Maffei (The Planetary Society 7) made these discoveries in 1968 through infrared examination. Billions of stars are visible in these galaxies located more than 10 million light years away. Maffei 1 is a disk-like object with bluish elliptical image at the center of the Lenticula-type galaxy with a bulge at the center. It nevertheless lacks spiral structure of dust content. Mafei 2 is a disk shape object with bar-like bulge and two major dusty spiral arms in a spiral galaxy. The image of the nebula is approximately 1.6 x 4.50 when compared to the full moon.  The blue light assumes 3.4-micron channels in starlight, whereas the green light is 12 microns and the red light is 22 microns controlled by the infrared emission of the dust (Planetary Society 3). Scientists have discovered that the object lies on the right ascension 2h 32min 35.57 sec with a declination of +610 29’ 2.3”. Its apparent magnitude is around 18.3 while the apparent dimensions are 60’ x 60’. Other discoveries have been made to show that the high dynamic range around 30 light years have majority if these stars. Open clusters are defined by few bright stars and numerous dim stars.

Past scientific discoveries came up with the name of the image, IC 1805 to indicate the index catalogue of the nebulae and the group of stars. It was first derived in the year 1895 and in 1908. Past studies appreciated open cluster due to technological boundaries. With modern imaging equipment, difference can be derived from the red cloud of the interstellar hydrogen gas and the dark dusty clouds. It is noticeable that the nebula extends 200 light years, with its name dating back to 1805 due to its heart shaped and the beauty existing in the universe. Present discoveries include a clear view of the image in the hydrogen alpha when set on a 200% to 300% of the telescope. Current discoveries confirm that the nebula was a result of supernova explosion of the Eastern arc of SNR HB 3().


Unique images feature on our universe as astronomers continue to make more discoveries. The study has defined heart nebula drawn on 27 October 2015 by astronaut Simon Addis, in its own galaxy. The study has reviewed the heart nebula and its features. The Heart Nebula, IC 1805, which lies about 7500 light-years away from the earth. The image is mostly found at the Perseus Arm in the Galaxy of the Cassiopeia constellation. The nebula shows glowing gas, which are hydrogen and the dust lanes. The shape and the color of this image is very attractive as it resembles the heart of an individual. The deep color defines the outline with some shiny objects reflecting the light from the stars drawing the observer to the object.

Works Cited

The Planetary Society. A piece of the heart of the Nebula. 2015.